#pragma once

#include<iostream>
#include<string>
class Timestamp
{
public:
    Timestamp();
    explicit Timestamp(int64_t microSecondsSinceEpoch_);
    //返回现在的时间
    static Timestamp now();
    std::string toSting() const;
private:
    int64_t microSecondsSinceEpoch_;

};